Mr. Barrows met with this species on the Lower Uruguay, in the month of September, and Burmeister obtained it near Mendoza. 129. CNIPOLEGUS CABANISI, Schulz. (CABANIS'S TYRANT.) +Cnipolegus cabanisi+, _Schulz, Journ. f. Orn._ 1882, p. 462. _Description._--Nearly uniform olivaceous slate-colour; below rather paler; wings and tail black: whole length 6·0 inches, wing 3·4, tail 3·1. _Female_ brownish olive, below paler; wings blackish, slightly edged with rufous; tail black, with broad rufous margins to the inner webs, and narrow similar margins to the outer webs; bill and feet brown. _Hab._ Tucuman. This is one of Herr Schulz's discoveries in Tucuman. He met with it, in the month of January, in the mountainous districts of that province. 130. CNIPOLEGUS CINEREUS, Scl. (CINEREOUS TYRANT.) +Cnipolegus cinereus+, _Scl. et Salv. Nomencl._ p. 43; _Döring, Journ. f. Orn._ 1878, p. 197 (Cordova); _Salvin, Ibis_, 1880, p. 357, pl. x. (Tucuman, Salta). _Description._--Dark cinereous, paler and more olivaceous on the back and wings; edges of wing-coverts and secondaries rather lighter; below paler, throat and breast blackish, like the head; inner margins of wing-feathers whitish; outer primaries acuminated; bill plumbeous, feet black: whole length 4·6 inches, wing 2·2, tail 2·3. _Female_ brownish cinereous; cap and rump rufous; wings blackish, tips of coverts and edges of outer secondaries whitish; tail blackish, inner webs of all the lateral rectrices, except the tips, rufous; beneath whitish. _Hab._ Northern Argentina. 131. LICHENOPS PERSPICILLATUS (Gm.). (SILVER-BILL TYRANT.) +Lichenops perspicillatus+, _Burm. La-Plata Reise_, ii. p. 457 (La Plata to Mendoza); _Scl. et Salv. P. Z. S._ 1868, p. 141 (Buenos Ayres); _iid. Nomencl._ p. 43; _Hudson, P. Z. S._ 1869, p. 432 (Buenos Ayres); _Gibson, Ibis_, 1880, p. 21 (Buenos Ayres); _White, P. Z. S._ 1882, p. 604 (Buenos Ayres); _Barrows, Bull. Nutt. Orn. Cl._ vol. viii. p. 141 (Entrerios, Azul). _Description._--Uniform black; primaries pure white, with black tips and bases; fleshy ring around the eye and bill yellow, feet black: whole length 5·6 inches, wings 3·5, tail 2·4. _Female_ above dark brown, with light brown edgings to the feathers; remiges chestnut, with dark-brown tips; wing-coverts dark brown with fulvous tips; beneath fulvous white, breast with dark striations; under wing-coverts fulvous; bill yellowish, feet black. _Hab._ Southern Bolivia, S.E. Brazil, Paraguay, Uruguay, La Plata, Chili, and Patagonia.